Cab ride company has trip fee of 2.5 and an additional charge of 0.04 for each 1/5 mile. the yellow cab company has an initial fare of 1.50 and an additional fee charge of 0.50 for each 1/4 mile.

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)